Establishing the influence of the quarry depth on the indicators of cyclic flow technology during the development of non-ore deposits

Abstract

Purpose. To determine the efficiency of the cyclic flow technology at the development of non-ore deposits depending on the location of haulage level, mobile crushing and sorting plants with variable productivity of the enterprise. Methodology. The research implemented the following methods: analytical method – to establish the dependence of the required number of dump trucks at the enterprise on the depth of non-ore quarry development at a given annual productivity; simulation modelling – to determine the influence of the mining depth of a non-ore quarry on the haulage distance of mining mass to the surface of the quarry. Findings. The performance indicators of the haulage system for the development of a non-ore quarry using dump trucks and conveyor transport in combination with a mobile crushing complex, as well as a mobile crushing and sorting plant on the haulage level, were determined. It was established that the use of cyclic flow technology with a mobile crushing complex on the haulage level allows reducing the haulage distance by 1.9 times at a quarry depth of 150 m. Originality. The dependence of the dump trucks productivity and their required number on the depth and production capacity of a non-ore quarry when using the haulage mining system was established. It was determined that an increase in the quarry depth from 50 to 150 m will lead to an increase in the number of dump trucks by 2.6 to 3.6 times, depending on the quarry productivity. At the same time, the use of cyclic flow technology with a mobile crushing complex in the quarry allows increasing the productivity of dump trucks by 2.1 times from 94.1 to 197.6 thousand tons/year due to the reduction of the haulage distance of dump trucks from 2525 to 575 m. Practical value. A methodology for determining the impact of the quarry depth on the parameters of the mining haulage complex has been developed when using the technique of cyclic and current action on non-ore raw material quarries, which takes into account the location of the mobile crushing and sorting plant, changes in the depth and annual productivity of the quarry, its area and parameters of the trenches. The indicators of the cyclical-flow mining technology, necessary for the further technical and economic assessment of the proposed solutions, have been established.